Acoustics bricks

Acoustics bricks no 1

Dänish size
Petringer
23% hulareal

Acoustics bricks no 2

Dänish size
Petringer
19% hulareal

Acoustics bricks no  4

Dänish size
Petringer
37% hulareal

Akustik sten nr. 7

Dansk normalformat
Petringer
28% hulareal

Acoustics bricks no 11

Dänish size
Hulareal 25%

Acoustics bricks no 14

Dänish size
23% hulareal

Acoustics bricks no 16

Dänish size
23% hulareal

Acoustics bricks no 23

Dansk bredstensformat
10% hulareal